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Rosgen Classification Exercise
Exercise Objective
To apply Rosgen classification of Reaches and determine Reach type based on fluvial geomorphologic characteristics.
Exercise Process
- Two statements are presented below, each containing qualitative and quantitative descriptions of the system.
- For each statement, use the Rosgen classification chart to characterize the Stream Reach.
- Start with characterizing entrenchment ratio, width to depth ratio, Sinuosity, and slope to determine what letter type.
- Finish with characterizing the channel material to determine the number type.
A single threaded channel has an Entrenchment Ratio greater than 2.2, has a width to depth ratio less than 12, has Sinuosity greater than 1.5, has slopes less than 0.02, and has a sand channel material. What is its likely Rosgen Classification?
A single threaded channel has an Entrenchment Ratio less than 1.4, has a width to depth ratio greater than 12, has Sinuosity greater than 1.2, has slopes less than 0.02, and has a cobble channel material. What is its likely Rosgen Classification?
Image courtesy of Rosgen
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